2_slow_2_go

ok so me and a friend put a d16y7 into a 94 civic hatch dx and it wasnt getting spark so we put a new dizzy on it and that showed it had spark with the test light to the wires, but when your crank it it shows power going to the ground when you put the test light on it, and when you turn on the head lights the dash lights dont come on anymore, what could cause that? maybe ecu? thats the only thing that i could think of i need help asap